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Video quality evaluation method based on three-dimensional wavelet transform

A technology of wavelet transform and evaluation method, applied in television, image data processing, instruments, etc., can solve the problems of video time-domain quality evaluation difficulty and poor consistency, etc.

Active Publication Date: 2014-12-10
陕西时青网络科技有限公司
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Problems solved by technology

Although the above methods describe the time domain information of video sequences from different angles, at present, the understanding of the processing methods of human eyes watching video information is relatively limited, so the above methods have certain limitations in the description of time domain information , that is, it is difficult to evaluate the video quality in the temporal domain, which eventually leads to poor consistency between the objective evaluation results and the subjective perception quality of the human eye.

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  • Video quality evaluation method based on three-dimensional wavelet transform
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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] A video quality evaluation method based on three-dimensional wavelet transform proposed by the present invention, its overall realization block diagram is as follows figure 1 As shown, it includes the following steps:

[0042] ① Order V ref Denotes the original undistorted reference video sequence, let V dis Denotes a distorted video sequence, V ref and V dis Both contain N fr frame image, where N fr ≥2 n , n is a positive integer, and n∈[3,5], n=5 in this embodiment.

[0043] ② with 2 n The frame image is a frame group, the V ref and V dis divided into n GoF frame group, the V ref The i-th frame group in is denoted as will V dis The i-th frame group in is denoted as in, symbol is the symbol of rounding down, 1≤i≤n GoF .

[0044] Since n=5 in this embodiment, 32 frames of images are used as a frame group. In actu...

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Abstract

The invention discloses a video quality evaluation method based on three-dimensional wavelet transform. The three-dimensional wavelet transform is applied to video quality evaluation, secondary three-dimensional wavelet transform is performed on each frame group in a video, and description of time domain information in the frame groups is finished through decomposition of a video sequence on a timeline, so that the problem of difficulty in describing the time domain information of the video is solved at a certain degree, the objective quality evaluation accuracy of the video is effectively increased, and the correlation between an objective evaluation result and human eye subjective perception quality is effectively improved; and specific to time domain correlation existing among the frame groups, the quality of each frame group is weighted through motion intensity and brightness characteristic, so that the method disclosed by the invention can well comfort to human eye visual characteristics.

Description

technical field [0001] The invention relates to a video signal processing technology, in particular to a video quality evaluation method based on three-dimensional wavelet transform. Background technique [0002] With the rapid development of video coding technology and display technology, various video systems have been widely used and concerned, and have gradually become the research focus in the field of information processing. Video information will inevitably introduce distortion due to a series of uncontrollable factors in the stages of video acquisition, encoding and compression, network transmission, and decoding and display, resulting in the degradation of video quality. Therefore, how to accurately and effectively measure video quality plays an important role in the development of video systems. Video quality evaluation is mainly divided into two categories: subjective quality evaluation and objective quality evaluation. Since visual information is finally accept...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCG06T7/0002G06T2207/10016G06T2207/20064G06T2207/30168H04N17/004
Inventor 蒋刚毅宋洋刘姗姗郑凯辉靳鑫
Owner 陕西时青网络科技有限公司
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